Shedding mechanism for looms



H. HALGROPT. Shedding Mechanism for Looms.

No. 228,191. Patented 111.181,18'80'.

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Arent HENRY HALOROFT, OF MEDIA, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO LEWIS PALMER, OF OONCORDVILLE, PENNSYLVANIA.

SHEDDING MECHANISIW FOR LOOIVIS.

SPECIFICATION forming part of Letters Patent No. 228,191, dated June 1, 1880.

Application led January 5, 1880.

To all whom t may concern:

Be it known that I, HENRY HALcRoF'r, of Media, in the county of Delaware and State of Pennsylvania, have invented a new and useful Improvement in Shedding Mechanisms for Looms, of which the following is a specilication, reference being had to the accompanying drawings.

My invention relates particularly to those 1o looms having rollers above and treadles below the heddles, whereby the latter are vibrated, and specically to an improved mode and devices for connecting the heddles with the treadles, whereby the connecting straps or cords are made more nicely and readily adjustable than heretofore, each independently l of the others, and also whereby a considerable saving in wear and tear is effected, as hereinafter explained.

zo Figure l of the accompanying drawings is a longitudinal section of a loom to which my improvement has been applied. Fig. 2 is a front view of the same; and Fig. 3 is a vertical sectional view of 011e form of my invention, as

hereinafter described.

H are the heddles; J, the heddle-jacks; T, the treadles; O, cords or straps connecting the jacks and heddles; E, cams or tappels which operate the treadles; P, a plate with 3o openings to receive screw-pins S.

F is the frame of the loom.

This being' an ordinary roller-looln, I shall refer only to those parts necessary to a clear understanding of my improvement.

ln the roller-looms in general use the connection between the heddle-jack and treadle is made by means ot' a common flat leather strap, with holes, attached to the jack and passed down around a sheave or hook xed to 4o the treadle, then up and buckled. Being' a practical weaver, I have noted the defects of this plan, which myinvention is intended to obviate to a greater or less degree. These are, first, by reason of the constant vibration and 4 5 consequent friction when the loom is in motion, the straps and buckles wear out comparatively soon, and also sometimes become unbuckled; second, the adjustment of the length of the straps whereby the shed may be altered can 5o neither be nicely nor readily made; third, the

Each of the cords C is attached to jacks J 6o l and .passes through eyes or around sheaves on the treadle T, (there being in this instance two eyes or sheaves to each treadle,) and thence to a screw pin or bolt, S, to which it is fastened, as shown. opening' in a plate, P, which is screwed or nailed to frame F. After the cord is attached to pin S the connection between the hed- (lle-jack and treadle may be practically lengthened or shortened, thereby altering the shed, 7o by turning the nut N, and it is evident that this may be done readily and to a nicety without stopping the loom. v

It is also plain that other equivalent adjusting devices arranged substantially as that I have described may be substitutedfor instance, that shown by Fig. 3, wherein the ordinary flat strap C', with its series of holes x, is fastened to the heddle-jack J ,passed down around sheave e', and its free end caught by 8o passing one of the pins or studs S', projecting from plate P', through any one of the perforations provided for the purpose; or the holes may be dispensed with and a suitable clamping device be employed to hold the strap at the desired point.

I claim- In combination with cords O, the heddles H, and the treadles T, provided with eyes or sheaves, the plate P, provided with a series of 9o screw-pins and nuts, or equivalent devices, for securing the free ends of the cords, each independently of the others, whereby any one of said cords may be readily let out or drawn up while the loom is in motion, substantially as described.

HENRY HALOROFT. Witnesses:

SYLvEsrER A. SCHMITT, LIsLE S'roKEs.

Each pin S projects through an 65 t 

